BME Frontiers / 2020 / Article / Fig 4

Research Article

Functional Photoacoustic and Ultrasonic Assessment of Osteoporosis: A Clinical Feasibility Study

Figure 4

PA spectral analysis results of the control group () vs. the osteoporosis group (). The upper and the lower panels are for the results acquired at the 800 nm and 930 nm laser wavelengths, respectively. In each panel, (a) shows the PA spectral parameter slopes as a function of the BMD of the spine measured by DEXA, (b) shows the PA spectral parameter slopes as a function of the BMD of the total femur measured by DEXA, (c) shows the averages and the standard deviations of the quantified slopes from the two groups, (d) shows the PA spectral parameter weighted frequencies as a function of the BMD of the spine measured by DEXA, (e) shows the PA spectral parameter weighted frequencies as a function of the BMD of the total femur measured by DEXA, and (f) shows the averages and the standard deviations of the quantified weighted frequencies from the two groups. The PA spectral parameters from the control group and the osteoporosis group are shown in blue circles and red rectangles, respectively. stands for in the unpaired -test comparing the spectral parameters from the two groups. The two outliers in (a) and (d) in each panel were resulting from aberrant DEXA analyses and are reasonable to be excluded from the analyses.

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